Finding the Fourth Proportional to 1,407.31, 2,111.22 and 482.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,407.31 : 2,111.22 = 482.96 : x
2. Step 2: Convert to fraction form
   1,407.31/2,111.22 = 482.96/x
3. Step 3: Cross multiply
   1,407.31x = 2,111.22 × 482.96
4. Step 4: Simplify right side
   1,407.31x = 1,019,628.21
5. Step 5: Solve for x
   x = 1,019,628.21/1,407.31
6. Step 6: Final answer
   x = 724.52